The landmarked building at 90 West Street that was extensively damaged on Sept. 11 is in contract to be sold for just over $10 million and converted to residential use.

But before you pull out your wallets to take home what appears to be a tremendous bargain, understand that the 350,000-square-foot building could require an additional $135 a foot to renovate, plus millions more to restore to Landmarks Commission specs, bring it up to current city codes, and then complete the finishes on luxury apartments.

Real estate sources identified the buyer as Brock Capital Real Estate, a company that was in line to buy portions of the glitzy green One, Two and Three U.N. Plaza from the Giuliani administration before Bloomberg officials KO’d the deal.

Led by Moshe Dan-Azogui, Brock Capital is the U.S. affiliate of VSP Capital Holdings, which is traded on the Tel Aviv stock market. Dan-Azogui did not return calls for comment.

Paul Johnson of Aegon USA, the Midwestern company that owns the property, advised by e-mail, “We have received inquiries concerning the acquisition of 90 West. We continue to be the owner of record of 90 West.” Sources said they will walk away with their insurance proceeds and that anything else they get on the building “is gravy.”

“One of the things that is attractive about the property for residential converters is that it is on two corners and has 360-degree views, which is very unique as compared to the other 15-plus projects in that area,” said Andrew Heiberger, president of Citi-Habitats.